adjectiveEtymology: Middle English duretik, diuretic, from Late Latin diureticus, from Greek diour?tikos, from diourein to urinate, from dia- + ourein to urinate — more at urineDate: 14th century tending to increase the excretion of urine <diuretic drugs> • diureticnoun • diureticallyadverb

(diuretics) A diuretic is a substance which makes your body increase its production of waste fluids, with the result that you need to urinate more often than usual. (MEDICAL or TECHNICAL) Alcohol acts as a diuretic, making you even more dehydrated.N-COUNT • Diuretic is also an adjective. Many remedies effective in joint disease are primarily diuretic.ADJ